A businessman has been found guilty of being part of a near-£200,000 conspiracy to pass off 30 tonnes of horsemeat as beef, much of which went on to enter the food chain.

Andronicos Sideras, 55, one of the owners of meat manufacturer Dinos & Sons, mixed the meats together before it was sold on to other firms in a plot which deceived consumers and food processors.

The jury of five men and seven women at Inner London Crown Court took 10 hours and 17 minutes to deliver a majority guilty verdict following a four-week trial.

A horse ID chip, roughly the size of a grain of rice, which was found in horse meat being passed off as beef (London Police/PA)

Ulrik Nielsen, 58, owner of FlexiFoods, and his “right-hand man”, Alex Beech, 44, had already pleaded guilty to their part in the plot.

The court heard how Danish-owned company FlexiFoods would buy horsemeat and beef from suppliers across Europe and have it delivered to Dinos in Tottenham, north London.

Labels and paperwork were fabricated to make the mixed meat appear like pure beef, before it was sold on to food manufacturers making products for a “vast range of well-known companies”, prosecutor Jonathan Polnay told the trial.

Dinos is a provider for several Greek restaurants, supermarkets and other producers.

Andronicos Sideras (isabel Infantes/PA)

Mr Polnay told the court during the trial that the plot was “motivated by greed” and said it could not have happened without the “connivance” of Sideras.

At the time, beef could be sold at a wholesale price of three euro per kilogram, while horsemeat was cheaper at two euro per kilogram.

The plot unravelled in September 2012 when one of the loads ended up in a Freeza Meat store in Newry, Northern Ireland, and a surprise health inspection by Newry and Mourne District Council later revealed a third of the pallets contained horsemeat. Horse ID chips, roughly the size of a grain of rice, were also found in the meat.

They belonged to two horses named Trak and Wiktor from the Lodz region of Poland, and a third Irish Hunter horse called Carnesella Lady, from rural county Galway.

(David Davies/PA)

The horses had all been owned by farmers who sold them on to parties who police said failed to re-register the animals, meaning they could only be traced back to their original owners.

The animals had not been sold for slaughter and there is no suggestion the farmers had any involvement in the conspiracy, police said.

Sideras, of Southgate, north London, had claimed that he was not part of the conspiracy and had only stored the product for FlexiFoods. But the jury found him guilty of one count of conspiracy to defraud between January 1 and November 30 2012, the same charge to which Nielsen and Beech had earlier pleaded guilty.

Dinos had a number of infringements for mislabelling products between 2007 and 2012.

Sideras was released on bail ahead of sentencing alongside Nielsen, of Gentofte in Denmark, and Beech, from Sutton-on-Hull, on Monday at the same court.